How to claim the money back after finding that a car is faulty?

Dear sir/madam,

My husband and I (Swiss, new Dubai residents) bought a car in Dubai and drove it together with the seller (private), everything seemed in perfect condition. When preparing for the insurance, we learned it was an “accident car”.

We contacted the seller who explained that he had imported the car from the US and repaired it but it was in perfect condition (apart from a few scratches), which we naively believed and trusted.

After purchasing the car, we realized that the airbag and AC did not work. We brought the car to the Orange Auto test center which detected faults in the Digital Engine Electronic, Airbag, Gateway, Rear end electronic, and AC.

We asked the seller to return the car and get our money back, or we would sue him for deception related to the sale of a vehicle with significant safety deficiencies. The seller responded that if we are not happy, we should sell it again.

Please let me know if you can help me in suing the seller!